Even more than being the guy who has to stand between Oprah and a donut between meals. MMA fighters are highly trained individuals who know how and where not to strike opponents to reduce the risk of serious injury; they are also in fantastic physical shape, so they can withstand a lot. But even still, you can get your butt handed to you. Seriously. That's an actual move.
Horrifying injuries don't happen to every MMA fighter, but they can happen. You wouldn't want to be Zach Kirk, whose neck was broken in a bout and is now paralyzed for life. Or how about this fighter whose leg became broken and bent completely backward after a kick? That desk job sounding any better to you yet?